Sunspots are areas:
A) caused by the Sun's magnetic field restricting heat exchange in the photosphere.
B) that appear as towering pillars that rise from the Sun's surface.
C) where the temperature is 100° warmer than surrounding areas.
D) that generally persist for only a few seconds.
Correct Answer:
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Q24: The radiation emitted by stars, galaxies, and
Q27: Neutron stars are _.
A) dense stars where
Q28: Red, flame-like jets of gas that rise
Q29: A red giant:
A) has an extremely hot
Q30: A _ is a concentration of billions
Q31: Our Sun is _ as a main-sequence
Q34: When hydrogen fusion ends within the core
Q36: Different regions of the Sun have different
Q36: All main-sequence stars are composed primarily of
Q38: The major reason for differences in temperature
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